{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Our study group consisted of 74 HIV - positive homosexual men belonging to groups II B , III and IV C2 from the Centers for Disease Control ( CDC ) classification of HIV disease ."}
{"Disease": ["HIV disease"], "Chemical": []}